| 4201 | RIOA | RIO STONE | SCAC4 | ||
| 4202 | RIOB | RIO BRAVO TRANSPORT INC | SCAC3 | ||
| 4203 | RIOB | RIO BRAVO TRUCKING SA DE CV | SCAC4 | ||
| 4204 | RIOC | Roosevelt Island Operationg Corp. | USA | TRAFFIC | |
| 4205 | RIOD | RIO TRANS | SCAC4 | ||
| 4206 | RIOG | RIO GRANDE EXPRESS FREIGHT INC | SCAC3 | ||
| 4207 | RIOG | RIO GRANDE CARTAGE CO | SCAC4 | ||
| 4208 | RIOI | RICHARD OIL AND FUEL LLC | SCAC4 | ||
| 4209 | RIOL | RIO LINDA MARINE | SCAC3 | ||
| 4210 | RIOM | RIOM CORPORATION | SCAC3 | ||
| 4211 | RIOM | RIOM CORPORATION | SCAC4 | ||
| 4212 | RION | RICE, OWEN F | SCAC3 | ||
| 4213 | RIOO | RITCHIE TRUCKING SERVICE, INC | SCAC3 | ||
| 4214 | RIOO | RITCHIE TRUCKING SERVICE | SCAC4 | ||
| 4215 | RIOP | RIOS, PAUL JR | SCAC3 | ||
| 4216 | RIOP | RIO TRANSPORT INC | SCAC4 | ||
| 4217 | RIOR | RIOMAR AGENCIES INC. | SCAC3 | ||
| 4218 | RIOR | RIOMAR AGENCIES INC. | SCAC4 | ||
| 4219 | RIOS | RIOS WOOD & COAL YARD | SCAC3 | ||
| 4220 | RIOS | RIOS, M TRUCKING | SCAC4 | ||
| 4221 | RIOT | RIO MARINE INC, | SCAC3 | ||
| 4222 | RIOV | RIOJAS VASQUEZ, DIANA ROMELIA, ROIO | SCAC4 | ||
| 4223 | RIOW | RIGHT-O-WAY TRANSPORTATION INC | SCAC3 | ||
| 4224 | RIPA | RHODE ISLAND PUBLIC TRANSIT AUTHORI | SCAC3 | ||
| 4225 | RIPA | REFRIGERADOS INTERNACIONALES PARAIS | SCAC4 | ||
| 4226 | RIPD | RIPPE, DONALD W | SCAC3 | ||
| 4227 | RIPE | RIPPEE, D & S & SON TRUCKING | SCAC3 | ||
| 4228 | RIPH | RICHARD, PHILIPPE, LTD | SCAC3 | ||
| 4229 | RIPL | RINGSBY-PACIFIC LTD. | PWRC | ||
| 4230 | RIPM | R I P TRUCKING | SCAC3 | ||
| 4231 | RIPN | R I P TRANSPORTATION | SCAC3 | ||
| 4232 | RIPO | RIP-O-BEC INC | SCAC4 | ||
| 4233 | RIPP | RIPPEE, RICHARD | SCAC3 | ||
| 4234 | RIPR | RIVERSIDE PRODUCE INC | SCAC3 | ||
| 4235 | RIPTA | Rhode Island Public Transit Authority | USA | TRAFFIC | |
| 4236 | RIPX | Rochester Independent Packer, Inc. | added 7/1969; 4/1970-1/1980; eliminated 5/1983; 1/1994 (not listed) | NAKINA | |
| 4237 | RIPX | Rock Island Petroleum Co. | 8/1920 | NAKINA | |
| 4238 | RIPX | Rochester Independent Packer, Inc. | added 7/69; 4/70-1/80; eliminated 5/83; 1/94 | NRHS | |
| 4239 | RIPX | *ROCK ISLAND PETROLEUM CO. | PWRC | ||
| 4240 | RIPX | *ROCHESTER INDEPENDENT PACKER, INC. | PWRC | ||
| 4241 | RIPZ | ROANOKE INDUSTRIAL PARK | PWRC | ||
| 4242 | RIRA | RICHMOND, RAYMOND | SCAC3 | ||
| 4243 | RIRA | RILEY RACING LLC | SCAC4 | ||
| 4244 | RIRB | RINDAL, ROBERT | SCAC3 | ||
| 4245 | RIRB | RINDAL, ROBERT | SCAC4 | ||
| 4246 | RIRC | RINCON RECYCLING INC | SCAC4 | ||
| 4247 | RIRD | RICHARDS TRANSIT, INC | SCAC3 | ||
| 4248 | RIRG | RINGER, G & COMPANY INC | SCAC3 | ||
| 4249 | RIRI | RICH, R E TRUCKING CO | SCAC3 | ||
| 4250 | RIRL | RIVERA, RAUL TRUCKING | SCAC3 | ||
| 4251 | RIRN | RICKELMAN TRUCKING | SCAC3 | ||
| 4252 | RIRP | RISINGER TRANSPORT CORP | SCAC4 | ||
| 4253 | RIRT | RICHER, ROBERT TRANSPORT | SCAC3 | ||
| 4254 | RIRW | REICHERT, R W | SCAC3 | ||
| 4255 | RIRX | Southeastern Industrial Enterprises, Inc. | 7/2005; eliminated 10/2006 | NAKINA | |
| 4256 | RIRX | Rock Island Oil & Refining Co., Inc. | 4/1947-1/1950 | NAKINA | |
| 4257 | RIRX | Duncan Oil Co., Inc. | 7/1937-1/1941 | NAKINA | |
| 4258 | RIRX | Rock Island Refining Co. (Duncan Oil Co., Inc.) | 7/1935 | NAKINA | |
| 4259 | RIRX | Rock Island Refining Co. | 7/1930-7/1932 | NAKINA | |
| 4260 | RIRX | Rock Island Refining Co. (Duncan Oil Co., Inc.) | Apr-38 | NRHS | |
| 4261 | RIRX | *ROCK ISLAND OIL & REFINING CO. [DUNCAN OIL CO., INC.] | PWRC | ||
| 4262 | RIRX | +SOUTHEASTERN INDUSTRIAL ENTERPRISES, INC. | PWRC | ||
| 4263 | RIRX | Southeastern Industrial Enterprises | RSRV | ||
| 4264 | RIRX | SOUTHEASTERN INDUSTRIAL ENTERPRISES | SCAC4 | ||
| 4265 | RIS | Aeris Gestion | ICAO1 | ||
| 4266 | RIS | Rock Island Southern Ry. (Co.) | 7/1923-7/1954 | NAKINA | |
| 4267 | RIS | Rock Island Southern Ry. | 4/38-1/52 | NRHS | |
| 4268 | RIS | Regio-Infra-Service Sachsen GmbH | Chemnitz | D | privat-bahn.de |
| 4269 | RIS | ROCK ISLAND SOUTHERN RWY. CO. | PWRC | ||
| 4270 | RIS | Regio Infra Service | D | TRAFFIC | |
| 4271 | RIS | Regio Infra Service Sachsen GmbH | DE | VKM | |
| 4272 | RISB | RISBERGS TRUCK LINE | SCAC3 | ||
| 4273 | RISB | ROBINSON I SHIPPING CORPORATION LIB | SCAC4 | ||
| 4274 | RISC | RIVERSIDE SERVICE CORPORATION | SCAC3 | ||
| 4275 | RISE | REUSE IT STORE | SCAC4 | ||
| 4276 | RISF | RIST TRANSPORT LTD | SCAC3 | ||
| 4277 | RISF | RIST TRANSPORT LTD | SCAC4 | ||
| 4278 | RISH | RISH-POLL INC | SCAC3 | ||
| 4279 | RISI | RISS TRANSPORTATION COMPANY | SCAC3 | ||
| 4280 | RISI | RISINGER BROS TRANSFER INC (DEDICAT | SCAC4 | ||
| 4281 | RISL | RHODE ISLAND TOWING | SCAC3 | ||
| 4282 | RISM | R I S EXPRESS | SCAC3 | ||
| 4283 | RISM | RISTOW TRUCKING INC (TRUCKLOAD DIVI | SCAC4 | ||
| 4284 | RISN | RISINGER BROS TRANSFER INC | SCAC3 | ||
| 4285 | RISN | RISINGER BROS TRANSFER INC | SCAC4 | ||
| 4286 | RISO | RILEY & SON TRUCKING | SCAC3 | ||
| 4287 | RISQ | RIISER TRANSPORT INC | SCAC3 | ||
| 4288 | RISR | RISCHITELLI BROTHERS INC | SCAC3 | ||
| 4289 | RISS | RISS AND CO INC | PWRC | ||
| 4290 | RISS | D | TRAFFIC | ||
| 4291 | RIST | RISTOW TRUCKING INC | SCAC4 | ||
| 4292 | RISV | RAIMAR SERVICES INC | SCAC3 | ||
| 4293 | RISV | RELIABLE INTERMODAL SERVICES LLC | SCAC4 | ||
| 4294 | RISW | RIVERSIDE WASTE PAPER CORP | SCAC3 | ||
| 4295 | RISX | Republic Steel Corp. | 7/1932 | NAKINA | |
| 4296 | RISX | Republic Iron & Steel Co. | 7/1930 | NAKINA | |
| 4297 | RISX | REPUBLIC STEEL CORP. [REPUBLIC IRON & STEEL CO.] | PWRC | ||
| 4298 | RISZ | RILEY SPUR | PWRC | ||
| 4299 | RISZ | JDSB REFRIGERATED INTERMODAL SERVIC | SCAC4 | ||
| 4300 | RIT | Asian Spirit | IATA: 6K | ICAO1 |